1. Institute of Low Temperature and Structure Research
2. Polish Academy of Sciences
3. Wroclaw
4. Poland
5. Institute of Physics
6. Faculty of Physics
7. Astronomy and Informatics
8. Nicolaus Copernicus University
9. Toruń, 87-100
10. Institute of Theoretical Physics and Astrophysics
11. University of Gdańsk
12. Gdańsk, 80-308
13. Departamento de Quimica
14. Instituto Universitario de Ciencia de Materiales Nicolás Cabrera
15. and Condensed Matter Physics Center (IFIMAC)
16. Universidad Autónoma de Madrid
17. 28049 Spain